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root/svn/ircd-hybrid/branches/8.2.x/src/ircd.c
Revision: 3215
Committed: Tue Mar 25 19:23:15 2014 UTC (10 years ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid/trunk/src/ircd.c
File size: 17202 byte(s)
Log Message:
- Fixed some comments; cleaned up style here and there

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2014 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19 * USA
20 */
21
22 /*! \file ircd.c
23 * \brief Starts up and runs the ircd.
24 * \version $Id$
25 */
26
27 #include "stdinc.h"
28 #include "s_user.h"
29 #include "list.h"
30 #include "ircd.h"
31 #include "channel.h"
32 #include "channel_mode.h"
33 #include "client.h"
34 #include "event.h"
35 #include "fdlist.h"
36 #include "hash.h"
37 #include "irc_string.h"
38 #include "ircd_signal.h"
39 #include "s_gline.h"
40 #include "motd.h"
41 #include "conf.h"
42 #include "hostmask.h"
43 #include "numeric.h"
44 #include "packet.h"
45 #include "parse.h"
46 #include "irc_res.h"
47 #include "restart.h"
48 #include "rng_mt.h"
49 #include "s_auth.h"
50 #include "s_bsd.h"
51 #include "log.h"
52 #include "s_misc.h"
53 #include "s_serv.h" /* try_connections */
54 #include "send.h"
55 #include "whowas.h"
56 #include "modules.h"
57 #include "memory.h"
58 #include "mempool.h"
59 #include "hook.h"
60 #include "ircd_getopt.h"
61 #include "supported.h"
62 #include "watch.h"
63 #include "conf_db.h"
64 #include "conf_class.h"
65
66
67 #ifdef HAVE_LIBGEOIP
68 GeoIP *geoip_ctx;
69 #endif
70
71 /* /quote set variables */
72 struct SetOptions GlobalSetOptions;
73 struct Counter Count;
74 struct ServerState_t server_state;
75 struct ServerStatistics ServerStats;
76 struct timeval SystemTime;
77 struct Client me; /* That's me */
78 struct LocalUser meLocalUser; /* That's also part of me */
79
80 const char *logFileName = LPATH;
81 const char *pidFileName = PPATH;
82
83 char **myargv;
84
85 int dorehash = 0;
86 int doremotd = 0;
87
88 /* Set to zero because it should be initialized later using
89 * initialize_server_capabs
90 */
91 int default_server_capabs = 0;
92 unsigned int splitmode;
93 unsigned int splitchecking;
94 unsigned int split_users;
95 unsigned int split_servers;
96
97 /* Do klines the same way hybrid-6 did them, i.e. at the
98 * top of the next io_loop instead of in the same loop as
99 * the klines are being applied.
100 *
101 * This should fix strange CPU starvation as very indirectly reported.
102 * (Why do you people not email bug reports? WHY? WHY?)
103 *
104 * - Dianora
105 */
106
107 int rehashed_klines = 0;
108
109
110 /*
111 * print_startup - print startup information
112 */
113 static void
114 print_startup(int pid)
115 {
116 printf("ircd: version %s(%s)\n", ircd_version, serno);
117 printf("ircd: pid %d\n", pid);
118 printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
119 : "foreground", ConfigFileEntry.dpath);
120 }
121
122 static void
123 make_daemon(void)
124 {
125 int pid;
126
127 if ((pid = fork()) < 0)
128 {
129 perror("fork");
130 exit(EXIT_FAILURE);
131 }
132 else if (pid > 0)
133 {
134 print_startup(pid);
135 exit(EXIT_SUCCESS);
136 }
137
138 setsid();
139 }
140
141 static int printVersion = 0;
142
143 static struct lgetopt myopts[] =
144 {
145 {"configfile", &ConfigFileEntry.configfile,
146 STRING, "File to use for ircd.conf"},
147 {"glinefile", &ConfigFileEntry.glinefile,
148 STRING, "File to use for gline database"},
149 {"klinefile", &ConfigFileEntry.klinefile,
150 STRING, "File to use for kline database"},
151 {"dlinefile", &ConfigFileEntry.dlinefile,
152 STRING, "File to use for dline database"},
153 {"xlinefile", &ConfigFileEntry.xlinefile,
154 STRING, "File to use for xline database"},
155 {"resvfile", &ConfigFileEntry.resvfile,
156 STRING, "File to use for resv database"},
157 {"logfile", &logFileName,
158 STRING, "File to use for ircd.log"},
159 {"pidfile", &pidFileName,
160 STRING, "File to use for process ID"},
161 {"foreground", &server_state.foreground,
162 YESNO, "Run in foreground (don't detach)"},
163 {"version", &printVersion,
164 YESNO, "Print version and exit"},
165 {"help", NULL, USAGE, "Print this text"},
166 {NULL, NULL, STRING, NULL},
167 };
168
169 void
170 set_time(void)
171 {
172 struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
173
174 if (gettimeofday(&newtime, NULL) == -1)
175 {
176 ilog(LOG_TYPE_IRCD, "Clock Failure (%s), TS can be corrupted",
177 strerror(errno));
178 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
179 "Clock Failure (%s), TS can be corrupted",
180 strerror(errno));
181 server_die("Clock Failure", 1);
182 }
183
184 if (newtime.tv_sec < CurrentTime)
185 {
186 ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%lu < %lu)",
187 (unsigned long)newtime.tv_sec, (unsigned long)CurrentTime);
188 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
189 "System clock is running backwards - (%lu < %lu)",
190 (unsigned long)newtime.tv_sec,
191 (unsigned long)CurrentTime);
192 set_back_events(CurrentTime - newtime.tv_sec);
193 }
194
195 SystemTime.tv_sec = newtime.tv_sec;
196 SystemTime.tv_usec = newtime.tv_usec;
197 }
198
199 static void
200 io_loop(void)
201 {
202 while (1)
203 {
204 /*
205 * Maybe we want a flags word?
206 * ie. if (REHASHED_KLINES(global_flags))
207 * SET_REHASHED_KLINES(global_flags)
208 * CLEAR_REHASHED_KLINES(global_flags)
209 *
210 * - Dianora
211 */
212 if (rehashed_klines)
213 {
214 check_conf_klines();
215 rehashed_klines = 0;
216 }
217
218 if (listing_client_list.head)
219 {
220 dlink_node *ptr = NULL, *ptr_next = NULL;
221 DLINK_FOREACH_SAFE(ptr, ptr_next, listing_client_list.head)
222 {
223 struct Client *client_p = ptr->data;
224 assert(client_p->localClient->list_task);
225 safe_list_channels(client_p, client_p->localClient->list_task, 0);
226 }
227 }
228
229 /* Run pending events, then get the number of seconds to the next
230 * event
231 */
232 while (eventNextTime() <= CurrentTime)
233 eventRun();
234
235 comm_select();
236 exit_aborted_clients();
237 free_exited_clients();
238
239 /* Check to see whether we have to rehash the configuration .. */
240 if (dorehash)
241 {
242 rehash(1);
243 dorehash = 0;
244 }
245
246 if (doremotd)
247 {
248 motd_recache();
249 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
250 "Got signal SIGUSR1, reloading motd file(s)");
251 doremotd = 0;
252 }
253 }
254 }
255
256 /* initalialize_global_set_options()
257 *
258 * inputs - none
259 * output - none
260 * side effects - This sets all global set options needed
261 */
262 static void
263 initialize_global_set_options(void)
264 {
265 memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
266
267 GlobalSetOptions.autoconn = 1;
268 GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
269 GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
270
271 if (ConfigFileEntry.default_floodcount)
272 GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
273 else
274 GlobalSetOptions.floodcount = 10;
275
276 /* XXX I have no idea what to try here - Dianora */
277 GlobalSetOptions.joinfloodcount = 16;
278 GlobalSetOptions.joinfloodtime = 8;
279
280 split_servers = ConfigChannel.default_split_server_count;
281 split_users = ConfigChannel.default_split_user_count;
282
283 if (split_users && split_servers && (ConfigChannel.no_create_on_split ||
284 ConfigChannel.no_join_on_split))
285 {
286 splitmode = 1;
287 splitchecking = 1;
288 }
289
290 GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
291 /* End of global set options */
292 }
293
294 /* initialize_server_capabs()
295 *
296 * inputs - none
297 * output - none
298 */
299 static void
300 initialize_server_capabs(void)
301 {
302 add_capability("QS", CAP_QS, 1);
303 add_capability("EOB", CAP_EOB, 1);
304 add_capability("TS6", CAP_TS6, 0);
305 add_capability("CLUSTER", CAP_CLUSTER, 1);
306 add_capability("SVS", CAP_SVS, 1);
307 #ifdef HALFOPS
308 add_capability("HOPS", CAP_HOPS, 1);
309 #endif
310 }
311
312 /* write_pidfile()
313 *
314 * inputs - filename+path of pid file
315 * output - NONE
316 * side effects - write the pid of the ircd to filename
317 */
318 static void
319 write_pidfile(const char *filename)
320 {
321 FILE *fb;
322
323 if ((fb = fopen(filename, "w")))
324 {
325 char buff[IRCD_BUFSIZE];
326 unsigned int pid = (unsigned int)getpid();
327
328 snprintf(buff, sizeof(buff), "%u\n", pid);
329
330 if ((fputs(buff, fb) == -1))
331 ilog(LOG_TYPE_IRCD, "Error writing %u to pid file %s (%s)",
332 pid, filename, strerror(errno));
333
334 fclose(fb);
335 }
336 else
337 {
338 ilog(LOG_TYPE_IRCD, "Error opening pid file %s", filename);
339 }
340 }
341
342 /* check_pidfile()
343 *
344 * inputs - filename+path of pid file
345 * output - none
346 * side effects - reads pid from pidfile and checks if ircd is in process
347 * list. if it is, gracefully exits
348 * -kre
349 */
350 static void
351 check_pidfile(const char *filename)
352 {
353 FILE *fb;
354 char buff[IRCD_BUFSIZE];
355 pid_t pidfromfile;
356
357 /* Don't do logging here, since we don't have log() initialised */
358 if ((fb = fopen(filename, "r")))
359 {
360 if (fgets(buff, 20, fb) == NULL)
361 {
362 /* log(L_ERROR, "Error reading from pid file %s (%s)", filename,
363 * strerror(errno));
364 */
365 }
366 else
367 {
368 pidfromfile = atoi(buff);
369
370 if (!kill(pidfromfile, 0))
371 {
372 /* log(L_ERROR, "Server is already running"); */
373 printf("ircd: daemon is already running\n");
374 exit(-1);
375 }
376 }
377
378 fclose(fb);
379 }
380 else if (errno != ENOENT)
381 {
382 /* log(L_ERROR, "Error opening pid file %s", filename); */
383 }
384 }
385
386 /* setup_corefile()
387 *
388 * inputs - nothing
389 * output - nothing
390 * side effects - setups corefile to system limits.
391 * -kre
392 */
393 static void
394 setup_corefile(void)
395 {
396 #ifdef HAVE_SYS_RESOURCE_H
397 struct rlimit rlim; /* resource limits */
398
399 /* Set corefilesize to maximum */
400 if (!getrlimit(RLIMIT_CORE, &rlim))
401 {
402 rlim.rlim_cur = rlim.rlim_max;
403 setrlimit(RLIMIT_CORE, &rlim);
404 }
405 #endif
406 }
407
408 #ifdef HAVE_LIBCRYPTO
409 static int
410 always_accept_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
411 {
412 return 1;
413 }
414 #endif
415
416 /* init_ssl()
417 *
418 * inputs - nothing
419 * output - nothing
420 * side effects - setups SSL context.
421 */
422 static void
423 ssl_init(void)
424 {
425 #ifdef HAVE_LIBCRYPTO
426 const unsigned char session_id[] = "ircd-hybrid";
427
428 SSL_load_error_strings();
429 SSLeay_add_ssl_algorithms();
430
431 if ((ServerInfo.server_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL)
432 {
433 const char *s;
434
435 fprintf(stderr, "ERROR: Could not initialize the SSL Server context -- %s\n",
436 s = ERR_lib_error_string(ERR_get_error()));
437 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Server context -- %s\n", s);
438 }
439
440 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
441 SSL_CTX_set_options(ServerInfo.server_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
442 SSL_CTX_set_verify(ServerInfo.server_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
443 always_accept_verify_cb);
444 SSL_CTX_set_session_id_context(ServerInfo.server_ctx, session_id, sizeof(session_id) - 1);
445
446 if ((ServerInfo.client_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
447 {
448 const char *s;
449
450 fprintf(stderr, "ERROR: Could not initialize the SSL Client context -- %s\n",
451 s = ERR_lib_error_string(ERR_get_error()));
452 ilog(LOG_TYPE_IRCD, "ERROR: Could not initialize the SSL Client context -- %s\n", s);
453 }
454
455 SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_TLSv1);
456 SSL_CTX_set_options(ServerInfo.client_ctx, SSL_OP_TLS_ROLLBACK_BUG|SSL_OP_ALL);
457 SSL_CTX_set_verify(ServerInfo.client_ctx, SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,
458 always_accept_verify_cb);
459 #endif /* HAVE_LIBCRYPTO */
460 }
461
462 int
463 main(int argc, char *argv[])
464 {
465 /* Check to see if the user is running us as root, which is a nono */
466 if (geteuid() == 0)
467 {
468 fprintf(stderr, "Don't run ircd as root!!!\n");
469 return -1;
470 }
471
472 /* Setup corefile size immediately after boot -kre */
473 setup_corefile();
474
475 /* save server boot time right away, so getrusage works correctly */
476 set_time();
477
478 /* It ain't random, but it ought to be a little harder to guess */
479 init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));
480
481 me.localClient = &meLocalUser;
482 dlinkAdd(&me, &me.node, &global_client_list); /* Pointer to beginning
483 of Client list */
484 ConfigFileEntry.dpath = DPATH;
485 ConfigFileEntry.configfile = CPATH; /* Server configuration file */
486 ConfigFileEntry.klinefile = KPATH; /* Server kline file */
487 ConfigFileEntry.glinefile = GPATH; /* Server gline file */
488 ConfigFileEntry.xlinefile = XPATH; /* Server xline file */
489 ConfigFileEntry.dlinefile = DLPATH; /* dline file */
490 ConfigFileEntry.resvfile = RESVPATH; /* resv file */
491
492 myargv = argv;
493 umask(077); /* better safe than sorry --SRB */
494
495 parseargs(&argc, &argv, myopts);
496
497 if (printVersion)
498 {
499 printf("ircd: version %s(%s)\n", ircd_version, serno);
500 exit(EXIT_SUCCESS);
501 }
502
503 if (chdir(ConfigFileEntry.dpath))
504 {
505 perror("chdir");
506 exit(EXIT_FAILURE);
507 }
508
509 ssl_init();
510
511 if (!server_state.foreground)
512 {
513 make_daemon();
514 close_standard_fds(); /* this needs to be before init_netio()! */
515 }
516 else
517 print_startup(getpid());
518
519 setup_signals();
520
521 /* Init the event subsystem */
522 eventInit();
523
524 /* We need this to initialise the fd array before anything else */
525 fdlist_init();
526 log_set_file(LOG_TYPE_IRCD, 0, logFileName);
527 check_can_use_v6();
528 init_netio(); /* This needs to be setup early ! -- adrian */
529
530 /* Check if there is pidfile and daemon already running */
531 check_pidfile(pidFileName);
532
533 mp_pool_init();
534 init_dlink_nodes();
535 init_isupport();
536 dbuf_init();
537 hash_init();
538 init_ip_hash_table(); /* client host ip hash table */
539 init_host_hash(); /* Host-hashtable. */
540 client_init();
541 class_init();
542 whowas_init();
543 watch_init();
544 auth_init(); /* Initialise the auth code */
545 init_resolver(); /* Needs to be setup before the io loop */
546 modules_init();
547 read_conf_files(1); /* cold start init conf files */
548 init_uid();
549 initialize_server_capabs(); /* Set up default_server_capabs */
550 initialize_global_set_options();
551 channel_init();
552 read_links_file();
553 motd_init();
554 #ifdef HAVE_LIBGEOIP
555 geoip_ctx = GeoIP_new(GEOIP_MEMORY_CACHE);
556 #endif
557
558 if (EmptyString(ServerInfo.sid))
559 {
560 ilog(LOG_TYPE_IRCD, "ERROR: No server id specified in serverinfo block.");
561 exit(EXIT_FAILURE);
562 }
563
564 strlcpy(me.id, ServerInfo.sid, sizeof(me.id));
565
566 if (EmptyString(ServerInfo.name))
567 {
568 ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
569 exit(EXIT_FAILURE);
570 }
571
572 strlcpy(me.name, ServerInfo.name, sizeof(me.name));
573
574 /* serverinfo{} description must exist. If not, error out.*/
575 if (EmptyString(ServerInfo.description))
576 {
577 ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
578 exit(EXIT_FAILURE);
579 }
580
581 strlcpy(me.info, ServerInfo.description, sizeof(me.info));
582
583 me.from = &me;
584 me.servptr = &me;
585 me.localClient->lasttime = CurrentTime;
586 me.localClient->since = CurrentTime;
587 me.localClient->firsttime = CurrentTime;
588
589 SetMe(&me);
590 make_server(&me);
591
592 hash_add_id(&me);
593 hash_add_client(&me);
594
595 /* add ourselves to global_serv_list */
596 dlinkAdd(&me, make_dlink_node(), &global_serv_list);
597
598 load_kline_database();
599 load_dline_database();
600 load_gline_database();
601 load_xline_database();
602 load_resv_database();
603
604 if (chdir(MODPATH))
605 {
606 ilog(LOG_TYPE_IRCD, "Could not load core modules. Terminating!");
607 exit(EXIT_FAILURE);
608 }
609
610 load_all_modules(1);
611 load_conf_modules();
612 load_core_modules(1);
613
614 /* Go back to DPATH after checking to see if we can chdir to MODPATH */
615 if (chdir(ConfigFileEntry.dpath))
616 {
617 perror("chdir");
618 exit(EXIT_FAILURE);
619 }
620
621 /*
622 * assemble_umode_buffer() has to be called after
623 * reading conf/loading modules.
624 */
625 assemble_umode_buffer();
626
627 write_pidfile(pidFileName);
628
629 ilog(LOG_TYPE_IRCD, "Server Ready");
630
631 eventAddIsh("cleanup_glines", cleanup_glines, NULL, CLEANUP_GLINES_TIME);
632 eventAddIsh("cleanup_tklines", cleanup_tklines, NULL, CLEANUP_TKLINES_TIME);
633
634 /* We want try_connections to be called as soon as possible now! -- adrian */
635 /* No, 'cause after a restart it would cause all sorts of nick collides */
636 eventAddIsh("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
637
638 /* Setup the timeout check. I'll shift it later :) -- adrian */
639 eventAddIsh("comm_checktimeouts", comm_checktimeouts, NULL, 1);
640
641 eventAddIsh("save_all_databases", save_all_databases, NULL, DATABASE_UPDATE_TIMEOUT);
642
643 if (ConfigServerHide.links_delay > 0)
644 eventAddIsh("write_links_file", write_links_file, NULL, ConfigServerHide.links_delay);
645 else
646 ConfigServerHide.links_disabled = 1;
647
648 if (splitmode)
649 eventAddIsh("check_splitmode", check_splitmode, NULL, 60);
650
651 io_loop();
652 return 0;
653 }

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